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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2016-2022 Pytroll developers
#
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Convert NOAA 15 Spectral responses to new NOAA STAR format."""
import numpy as np
import pandas as pd
VIS_FILE = "/home/a000680/data/SpectralResponses/avhrr/NOAA15_AVHRR_responses_VIS.txt"
IR_FILE = "/home/a000680/data/SpectralResponses/avhrr/NOAA15_AVHRR_responses_IR.txt"
VIS_FIELDS = ['wvl1', 'resp1', 'wvl2', 'resp2', 'wvl3a', 'resp3a']
IR_FIELDS = ['wvl3b', 'resp3b', 'wvl4', 'resp4', 'wvl5', 'resp5']
OUTPUT_FILES = {'wvl1': 'NOAA_15_A302xx01.txt',
'wvl2': 'NOAA_15_A302xx02.txt',
'wvl3a': 'NOAA_15_A302xx3A.txt',
'wvl3b': 'NOAA_15_A302xx3B.txt',
'wvl4': 'NOAA_15_A302xx04.txt',
'wvl5': 'NOAA_15_A302xx05.txt'
}
def unpack_data(filename, fields):
"""Read the CSV ascii data from file and extract the fields specified."""
data = pd.read_csv(filename,
delim_whitespace=True,
names=fields,
false_values='-')
for i in range(0, len(fields), 2):
wvl = data[:][fields[i]].values
resp = data[:][fields[i + 1]].values
wvl = np.ma.masked_where(
wvl == '-', wvl).compressed().astype('float32')
resp = np.ma.masked_where(
resp == '-', resp).compressed().astype('float32') / 100.0
hdline = "Wavelegth (um) Normalized RSF"
np.savetxt(OUTPUT_FILES[fields[i]],
np.transpose([wvl.transpose(), resp.transpose()]),
fmt='%3.6f',
delimiter=' ' * 8,
header=hdline, newline='\n')
if __name__ == "__main__":
unpack_data(IR_FILE, IR_FIELDS)
unpack_data(VIS_FILE, VIS_FIELDS)
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